no need to trick source/destination project anymore, as trade_condition_type is used

Entity_getOutstandingAmount is meaningless in case of multiple source_section and multiple currencies.
Entity_hasOutstandingAmount will only report True or False.

Reuse Ticket_createProjectEvent

Force user to supply from the Allocation Supply configuration.
otherwise, alarms will clean up the manually added Software Installation.

those files exist in slapos_cloud